// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {LinkTokenInterface} from "../../shared/interfaces/LinkTokenInterface.sol";
import {VRFConsumerBase} from "../../vrf/VRFConsumerBase.sol";

// solhint-disable gas-custom-errors

contract VRFCoordinatorMock {
  LinkTokenInterface public LINK;

  event RandomnessRequest(address indexed sender, bytes32 indexed keyHash, uint256 indexed seed, uint256 fee);

  constructor(
    address linkAddress
  ) {
    LINK = LinkTokenInterface(linkAddress);
  }

  function onTokenTransfer(address sender, uint256 fee, bytes memory _data) public onlyLINK {
    (bytes32 keyHash, uint256 seed) = abi.decode(_data, (bytes32, uint256));
    emit RandomnessRequest(sender, keyHash, seed, fee);
  }

  function callBackWithRandomness(bytes32 requestId, uint256 randomness, address consumerContract) public {
    VRFConsumerBase v;
    bytes memory resp = abi.encodeWithSelector(v.rawFulfillRandomness.selector, requestId, randomness);
    uint256 b = 206_000;
    require(gasleft() >= b, "not enough gas for consumer");
    // solhint-disable-next-line avoid-low-level-calls, no-unused-vars
    (bool success,) = consumerContract.call(resp);
  }

  modifier onlyLINK() {
    require(msg.sender == address(LINK), "Must use LINK token");
    _;
  }
}